Siemens SIMATIC S7 System Manual page 592

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PID loops and tuning

11.7 PID Tune control panel

● Sampling: In the "Sampling" area, you can select the graphical display sampling rate from

1 to 480 seconds per sample.

You can freeze the graph by clicking the "Pause" button. Click the "Resume" button to

resume sampling data at the selected rate. To clear the graph, select "Clear" from the

right-mouse button within the graph.

● Advanced Options: You can use the "Options" button to further configure parameters for

the auto-tuning process. (See the figure below.)

From the advanced screen, you can check the box that causes the auto-tuner to

automatically determine the values for the Hysteresis and Deviation (default setting), or

you can enter the values for these fields that minimize the disturbance to your process

during the auto-tune procedure.

In the "Dynamic Response" field, use the dropdown button to select the type of loop

response (Fast, Medium, Slow, or Very Slow) that you wish to have for your process.

Depending upon your process, a fast response may have overshoot and would

correspond to an underdamped tuning condition. A medium speed response may be on

the verge of having overshoot and would correspond to a critically damped tuning

condition. A slow response may not have any overshoot and would correspond to an

overdamped tuning condition. A very slow response may not have overshoot and would

correspond to a heavily overdamped tuning condition.

Once you have made the desired selections, click OK to return to the main screen of the

PID Tune Control Panel.

System Manual, V2.3, 07/2017, A5E03822230-AF

S7-200 SMART

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Simatic s7-200 smart